Variety traits
Determinacy is a genetically determined plant growth habit where development is limited by the formation of a specific number of inflorescences. This trait defines bush architecture, maturation rates, and crop management strategies.
Mentioned in descriptions 12 519 varieties reference book.
Determinacy characterizes a plant's ability to cease vegetative growth after setting a fixed number of inflorescences, terminating in an apical flower cluster. Unlike indeterminate varieties that continue to develop throughout the season, determinate forms are distinguished by their compactness and focus on an early transition to the generative phase.
The trait defines the cultivation strategy by ensuring concentrated fruit set, which simplifies mechanized harvesting. This growth type requires specific agrotechniques, as improper pruning can lead to reduced productivity, while the plants themselves often do not require intensive staking.
The evaluation of determinacy during variety testing is conducted through field observations of plant architecture. Agronomists record the number of leaves to the first cluster, total plant height, and the terminal number of inflorescences on the main stem, classifying the variety on a scale from super-determinate to indeterminate forms.
Selection based on the description text, not official resistance ratings: such data is not available in registers. Mention indicates that the trait is discussed in the variety's sources; see the variety's profile for details on what is specifically stated.
Solanum lycopersicum L. · Tomato
Enza Zaden Beheer B.V.
Solanum lycopersicum L. · Tomato
Domaine Public (FR)
Cucumis sativus L. · Cucumber
SUNSEEDS
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Solanum lycopersicum L. · Tomato
HEBREW UNI/HAZERA
Solanum lycopersicum L. · Tomato
WESTERN SEED ESPAÑA, S.A.
Solanum lycopersicum L. · Tomato
Sakata Vegetables Europe SARL (FR)
Glycine max (L.) Merr. · Soybean
ALAIN LETOURNEAU
Solanum lycopersicum L. · Tomato
Syngenta Seeds B.V.
Cucumis sativus L. · Cucumber
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Solanum lycopersicum L. · Tomato
Monsanto Vegetable IP Management B.V.
Solanum lycopersicum L. · Tomato
Enza Zaden Beheer B.V.
Glycine max (L.) Merr. · Soybean
UNIVERSITY OF GUELPH
Solanum lycopersicum L. · Tomato
Monsanto Vegetable IP Management B.V.
Lupinus albus L. · White lupin
Union Poitou Anjou (FR)
Solanum lycopersicum L. var. lycopersicum · Tomato
EUGEN SEED S.R.L.
Solanum lycopersicum L. · Tomato
Enza Zaden Beheer B.V.
Solanum lycopersicum L. · Tomato
Syngenta Seeds, NL
Solanum lycopersicum L. · Tomato
ZKI, H
Solanum lycopersicum L. · Tomato
SEMILLAS FITO, S.A.
Solanum lycopersicum L. · Tomato
Harris Moran Seed Company
Glycine max (L.) Merr. · Soybean
Iowa Agriculture and Home Economics Experiment Station
Lupinus angustifolius L. · Narrow-leaf lupin
Hodowla Roslin Smolice Sp.z o.o Grupa IHAR
Solanum lycopersicum L. · Tomato
Enza Zaden Beheer B.V.